You may remember me talking about getting some bits together to research concertina pneumatic issues. Well, the slow boat from China has come in, and the even slower boat that is me seems to have got its act together. Here's the result:

Heh heh, you just want to see the bit where I suck the blue water back into a concertina, don't you.

I'll keep that in mind. I'm not naturally drawn to the video medium, but I did use it successfully recently to highlight a problem in a carillon, so it's probably about time I reconsidered my aversions.